a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks digits 1 and 2, at least one of digits 3,4 and at least one of digits 5,6,7,8,9.
A126628
a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks digits 1 and 2, at least one of digits 3,4 and at least one of digits 5,6,7,8,9.
Terms
- a(0) =8a(1) =62a(2) =470a(3) =3506a(4) =25718a(5) =184682a(6) =1294910a(7) =8867186a(8) =59423078a(9) =390804602a(10) =2529567950a(11) =16157024066a(12) =102070798838a(13) =639011269322
External references
- oeis: A126628